Hello construction expert,
thank you for the note about the form of address – I am happy to use the informal YOU form, although this is not generally applicable to "the net."
So far about TEUR 196 for a Kfw 70 efficiency house on a slab and an attic prepared for expansion including insulation of the location pellet heating.
Thank you very much for your cost estimate for KfW70.
... personally, I still find it borderline to place a 500 - 850 l buffer tank above the living floor. In my opinion, you should reconsider alternatives here.
Housing the buffer tank in the utility room would certainly be an option. I will calculate this with the various heating suppliers to see how much net space remains for the originally intended room usage (house connections, washing machine, storage, ...).
... a partial basement is not significantly cheaper than a full basement.
We had originally planned a bungalow with a flat roof and basement (for heating) regarding accessibility for old age. In discussions with potential construction companies, their unanimous statement was: a slab with a pitched roof is significantly cheaper than "going deep." For this reason, we planned upwards instead of a basement, and since there is no other space in the rooms for heating & co., nothing else remained but to place it on the intermediate ceiling.
... why are you leaving the attic unused?
- Accessibility for old age, - underfloor heating installation costs x2 + ongoing heating costs, - more complex insulation if used as living space, ...
... you have designed quite an unusual room layout on the ground floor
I have attached the room usage. Maybe it shows how the rooms are intended to be used individually. The goal was not to create "dead spaces" (long corridors from which the rooms branch off), but to design the living area openly – from which all rooms are accessible. The entrance can only be located on this end wall for various reasons.
What do you consider "unusual" about it – what would you consider to be solved more optimally?
... with the attic that exists anyway, you could "relax" the room layout a bit ...
Currently, no full story is planned upstairs, only high enough for the heating to fit. 300m[SUP]2[/SUP] of living space would be too much area that we do not need – but since there is no basement, it replaces storage space. On the other hand, the smaller dimensions of the single-family house mean that the rooms upstairs must basically be used, and "climbing stairs" is indispensable.
